The turning is the easy part...what's critical is the feature that insures there is an oil film on the surface at all times. NOS bushings are dimpled similar to internal transmission bushings, quite hard and not an easy thing to duplicate. I have not inspected an okie bushing close up but assume this feature is done by helical grooves of some sort which if done poorly would likely cause failure.
To recreate those dimples appears to be hard.
Though why can't the reproduction bushings have grooves machined into the bearing surface to allow lubrication.
The grooves cut possibly be cut straight or spiral.
Or how about a left-handed and right-handed spirals creating that cross hatch pattern similar to the dimples. Jeffrey
